Sheriff Mike Byrd said Anthony Eugene Moore, 46, died Monday. He had been taken to the hospital Sunday.

Moore was struck in the face by another inmate, identified by Byrd as 19-year-old Dionte Jones. Byrd said Jones had been talking on a phone, arguing with a family member. Moore walked by as the call ended. Byrd said Jones knocked Moore unconscious with a punch to the jaw.

The Mississippi Bureau of Investigation, Jackson County's criminal investigation division, and the Jackson County District Attorney's Office are investigating.

Moore was struck in a day room where inmates can gather, watch TV and use the telephone.